The answer is Arithmetic.
Arithmetic is the study of numbers and their properties. It is a branch of mathematics that deals with the basic operations of addition, subtraction, multiplication, and division. Arithmetic is also concerned with the properties of numbers, such as their order and their divisibility.
Geometry is the study of shapes and their properties. It is a branch of mathematics that deals with the properties of lines, angles, shapes, and solids. Geometry is also concerned with the measurement of shapes and solids.
Algebra is the study of mathematical symbols and their properties. It is a branch of mathematics that deals with the manipulation of symbols and equations. Algebra is also concerned with the solution of equations and problems.
Trigonometry is the study of triangles
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